Optimization of a grid-connected renewable energy system for a case study in Nablus, Palestine

摘要

Recently, the Palestinian energy authority has approved a renewable energy policy to resolve the electricity problem caused by the Palestinian-Israeli energy dispute. Based on this, clear technical aspects in regards to renewable energy systems must enforced. In this research, a renewable energy system consisting of a PV and a wind energy source is proposed to be connected to Nablus city electricity grid. The proposed system is optimally designed taking into consideration maximum system productivity and inverter size. Two evaluating factors are used to optimally choose the configuration of the proposed system namely final yield factor (FY) and capacity factor (CF). As for the inverter, a liner programming optimization is performed to find out the optimum inverter sizing ratio (the rated power of the energy source to the rated power of the inverter). The results show that the use of PV energy sources is more feasible as compared to wind energy sources in Nablus. Therefore, a grid-connected system consisting of PV array only as an energy source is recommended. Moreover, the optimum sizing ratio of the inverter in the proposed system is 1.42.